xx KEYS LEAVES ALTERNATE 



129. Leaf-scars triangular. p. 236. Ascyrum. 

 Leaf-scars angularly lens-shaped. p. 237. Hypericum. 



130. Twigs rather sharply 4-ridged. 131. 



Twigs at most angular or grooved below the nodes. 132. 



131. Leaf-scars ciliate or fringed at top. p. 309. Fontanesia. 

 Leaf-scars not ciliate. p. 250. Punica. 



132. Leaf-scars relatively broad (3 mm,). 133. 

 Leaf-scars minute (scarcely 2 mm.). 135. 



133. Buds superposed. 134. 



Buds not superposed. p. 313. Syringa. 



134. Bud-scales stiff-pointed. p. 317. Chionanthus. 

 Bud-scales not pungent. p. 310. Fraxinus. 



135. Leaf-scars low. 136. 

 Leaf-scars elevated. 137. 



136. Buds several, superposed, separated. p. 316. Forestiera. 

 Buds collaterally multiplied. p. 182. Coriaria. 

 Buds usually solitary: bark not shredding, p. 244. Daphne. 



137. Leaf-scars shriveled. p. 352. Symphoricarpos. 

 Leaf-scars distinctly outlined. 138. 



138. Bushy. 139. 



With a tendency to climb. p. 320. Jasminum. 



139. With a stipular line. p. 343. Pinckneya. 

 Without stipular vestiges. p. 319. Ligustrum. 



LEAVES ALTERNATE. 



140. Leaves represented by small scales, or by spines. 141. 

 Ordinary leaves, or their scars, present. 150. 



141. Wood-strands scattered through the stem. p. 7. Ruscus. 

 Wood in a zone between pith and bark. 142. 



142. Leaves persistent in the form of scales. 143. 

 Leaves or their axes persistent as spines. 146. 



143. Scales and buds minute: twigs spiny, p. 241. Koeberlinia. 

 Scales and buds evident, though small: not spiny. 144. 



144. Percurrent tree: twigs slender. p. 5. Taxodium. 

 Openly branched small trees or shrubs. 145. 



145. Pith central in the branches. p. 238. Myricaria. 

 Pith toward one side of the branches. p. 238. Tamarix. 



